Rabbitmq Upgrade restarts container only when image was changed.
Rabbitmq Upgrade restarts container only when image was changed.

This fix adds a check of Rabbitmq's image version during the upgrade.
The container gets restarted only when the image version is different.

Change-Id: Ie038845c0c8fff1ac51b7cbf21e1b593229c2c0e
Closes-Bug: #1558832

dardelean/kolla-ansible,openstack/kolla,openstack/kolla,coolsvap/kolla,GalenMa/kolla,mrangana/kolla,intel-onp/kolla,coolsvap/kolla,nihilifer/kolla,nihilifer/kolla,intel-onp/kolla,stackforge/kolla,mandre/kolla,dardelean/kolla-ansible,coolsvap/kolla,rahulunair/kolla,rahulunair/kolla,tonyli71/kolla,tonyli71/kolla,GalenMa/kolla,dardelean/kolla-ansible,stackforge/kolla,stackforge/kolla,mrangana/kolla,mandre/kolla,mandre/kolla